Parts for your 2020 Mitsubishi Outlander-Drive belt pulley

2020 Mitsubishi Outlander drive-belt pulley — what it does and when to replace it

Based on Mitsubishi Motors service information for the 2020 Outlander (engine and maintenance sections) and common parts catalogues (Mitsubishi ASA, Gates and Dayco application guides), the 2.4L four-cylinder and 3.0L V6 petrol Outlander models use an auxiliary/serpentine drive belt system with multiple pulleys (crankshaft/harmonic balancer, alternator and A/C compressor, plus an automatic tensioner and idlers). By contrast, the 2020 Outlander PHEV is built without a conventional accessory belt drive — it uses an electric A/C compressor and a DC‑DC converter in place of an alternator — so there’s no external drive-belt pulley to service on the PHEV.

On petrol models, the drive-belt pulley system transfers rotation from the crankshaft to essential accessories. The crank pulley (harmonic balancer) drives the belt, the alternator and A/C compressor pulleys are turned by that belt, and the spring-loaded tensioner and smooth idler pulleys keep the belt tight and tracking true. When everything’s healthy, the belt runs quietly, charges the battery reliably and keeps the cabin cool.

Over time, pulley bearings can dry out or wear, tensioners lose spring force, and belts harden or crack. That’s when you get squeaks at start-up, chirps when wet, or a grinding rumble. Left too long, a failing pulley can throw the belt — not ideal on a school run or a long Kiwi roadie. For routine servicing, it’s good practice to inspect the belt and pulleys at least every 12 months or 15,000 km. Many owners replace the belt around 90,000–150,000 km depending on condition, tensioner and idler pulleys are replaced on condition (noise/roughness) or with every second belt as cheap insurance. Always tighten fasteners to the workshop manual spec and check alignment after fitting.

• Tell-tale signs of trouble: cold-start squeal, intermittent chirp, visible belt cracks or glazing, wobbling tensioner arm, or a rumbling/rough pulley when spun by hand.
• Handy tips: keep oil/coolant off the belt, use the correct belt routing, spin each pulley during service for smoothness, and inspect the harmonic balancer for rubber separation.

If the vehicle is a 2020 Outlander PHEV, there’s no conventional drive belt or accessory pulleys to maintain. The A/C compressor is electric and the 12‑volt system is supplied via a DC‑DC converter, as outlined in Mitsubishi’s PHEV service documentation. Routine checks instead focus on software diagnostics and cooling systems for the electrified components.

FAQs

Does the 2020 Outlander PHEV have a drive-belt pulley?
No. The PHEV variant doesn’t use a conventional accessory belt. It runs an electric A/C compressor and uses a DC‑DC converter for the 12‑volt system, so there’s no alternator or external belt-driven accessories to service.

How often should the drive-belt pulley or tensioner be replaced on a 2020 Outlander petrol model?
Inspect annually or every 15,000 km. Replace the belt based on condition (commonly 90,000–150,000 km). Replace the tensioner and idler if they’re noisy, rough, or not holding tension, many techs change them with every second belt for peace of mind.

What does it typically cost to replace the belt and pulleys in AU/NZ?
Parts vary with brand, but a quality belt plus tensioner/idler is often in the $180–$400 range, with labour commonly 0.7–1.5 hours. Drive-away pricing at workshops typically lands around $250–$700, depending on engine, parts chosen and local rates.